Abstract: A USB power amplified trumpet connecting device comprises a digital conversion chip and a power amplifier chip on a circuit board; an input connected to a USB port as an input; and an output. The output is connected to one of an earphone, a trumpet, or an optical fiber terminal. The output seat is an optical output seat which is connected to an optical fiber terminal for further connecting to a decoding amplifier and then to a trumpet. Another the output can be an output wire; and the output wire is connected to a trumpet. The output is an output seat; and the output seat is able to output cable signals and optical fiber signals for being connected to one of an earphone, a trumpet and an optical fiber terminal.

Abstract: A USB music player comprises one USB connecting slot for receiving one portable memory, such as a pen disk or a thumb disk, each having a respective USB connector so as to read music format stored in the two portable memories; wherein data is transferred and recorded between the two portable memories and the USB music player; a plurality of insertion hole and a plurality of buttons; wherein music signals are transferred to an external playing device through the insertion holes; the playing of music is controlled by the control keys. Moreover, there may be only one slot in the USB music player. A wire or wireless earphone set is connected to one of the plurality of insertion holes. A trumpet or an amplifier is connected to one of the plurality of insertion holes.

Abstract: A multi-sound source wireless transmission system comprises a USB connector capable of being inserted to one of a notebook computer or an audio signal wire connected to a first electronic device; a transmission module connected to the USB connector for wirelessly transmitting sound signals to a receiving module in another far end second electronic device. The second electronic device is one of a CDs, MP3 players, TVs, Tuners, DVDs, VCDs, stereos, and computers. The wireless transmission is one of RF transmission and blue tooth transmission. The second electronic device is a head mounted earphone. The receiving module is capable of being hung on the waist and is connected to an inserting type earphone. The receiving module is installed to an MP3 player; and the receiving module is connected to an inserting type earphone for listening the sounds from the earphone.

Abstract: A palm type Dolby decoding earphone device comprises a Dolby decoder device having a sound effect input end; a sound effect output end; the sound effect input end having a digital optical fiber signal wire and an optical fiber input joint for connecting an external electronic device so that the sound effect input end can receive external digital sound signals; the Dolby decoder device serves to generate Dolby surrounding sound effect by the phase differences of the digital sound signals; at least one earphone set being connected to the sound effect output end for receiving the decoded sound signals from the control unit; each earphone set having two earphones for transmitting sound signals to the two ears of a user.

Abstract: A USB power amplified trumpet connecting device comprises a digital conversion chip and a power amplifier chip on a circuit board; an input connected to a USB port as an input; and an output. The output is connected to one of an earphone, a trumpet, or an optical fiber terminal. The output seat is an optical output seat which is connected to an optical fiber terminal for further connecting to a decoding amplifier and then to a trumpet. Another the output can be an output wire; and the output wire is connected to a trumpet. The output is an output seat; and the output seat is able to output cable signals and optical fiber signals for being connected to one of an earphone, a trumpet and an optical fiber terminal.

Abstract: A USP power amplified trumpet connecting device is disclosed. A digital conversion chip and a power amplifier chip are installed to one USB port for being further connected to a trumpet so as to emit sound directly. Moreover, an output connector can be included. Thus the use of the USP power amplified trumpet connecting device is easy and can be portable easily. Moreover, the output connector can be connected to a trumpet and an earphone. The output connector is an optical fiber output connector which is connected to a decoder or an amplifier with optical fiber input so as to emit sound. The output connector includes a general used output and an optical fiber terminal for being connected to an optical fiber output, an earphone or an trumpet.